(12)Manual or algorithmic abusive behaviours can also occur when a crypto-asset service provider determines the trading platform for crypto-asset to access or the crypto-asset service provider to which the orders are to be transmitted or any other conditions related to the execution of the order. Therefore, to ensure effective market surveillance, a person or computer algorithm within the crypto-asset service provider performing such activities should be identified in the order and transaction records. For the same reasons, where both a person and computer algorithm are involved, or more than one person or algorithm is involved, the crypto-asset service provider should determine, on a consistent basis following predetermined criteria, which person or algorithm is primarily responsible for those activities.